Abstract
The yellow rice stem borer (YRSB) Scirpophaga incertulas (Walker) is one of the most serious pests of rice in Southeast Asia. In the present study, the incidence of YRSB was surveyed in 2011 and 2012 at Anlao, a main rice growing district of Haiphong Province, Vietnam. Efficacy of removing YRSB egg masses and spraying with three insecticides was also examined. The results showed that the densities of YRSB larvae and pupae were very low in main rice-cropping times, i.e., late spring and middle summer seasons. In fact, the percentages of dead hearts and white heads were low. However, in middle summer, the density of YRSB and the percentage of damaged stems were higher than those in late spring rice. Efficacy of controlling measures was then evaluated with 11 treatments consisting of egg mass removal and insecticide applications. The results demonstrated that all measures provided better control of YRSB than the control. However, different measures resulted in different percentages of white heads. Efficacy of two newly used insecticides Virtako 40 WG and Prevathon 5 SC was highest when applied twice. The efficacy was followed by removal of egg mass twice, spraying Virtako 40 WG once or Prevathon 5 SC once with and without removal of egg mass and spraying Regent 800 WG. A combination of removing egg masses and spraying Regent 800 WG once provided a better result than spraying Regent 800 WG twice. Effective YRSB management tactics were discussed on the basis of the results obtained.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 5
Claim · model-written summary
Densities of yellow rice stem borer larvae and pupae were very low in main rice-cropping times.
- Taxon
- rice
Oryza sativae0 - Treatment
- main rice-cropping timese1
- Interactor
- Scirpophaga incertulas
Scirpophaga incertulase0pest - Outcome
- densities of YRSB larvae and pupaee1
- Direction
- very lowe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yellow rice stem borer (YRSB) Scirpophaga incertulas (Walker) is one of the most serious pests of rice in Southeast Asia”
e1“The results showed that the densities of YRSB larvae and pupae were very low in main rice-cropping times, i.e., late spring and middle summer seasons”
Claim · model-written summary
In middle summer, yellow rice stem borer density and the percentage of damaged stems were higher than in late spring rice.
- Taxon
- riceOryza sativae0
- Interactor
- YRSBe2pest
- Outcome
- density of YRSB and the percentage of damaged stemse2
- Direction
- highere2
- Comparator
- late spring ricee2
- Setting
- middle summere2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yellow rice stem borer (YRSB) Scirpophaga incertulas (Walker) is one of the most serious pests of rice in Southeast Asia”
e2“However, in middle summer, the density of YRSB and the percentage of damaged stems were higher than those in late spring rice”
Claim · model-written summary
All control measures gave better control of yellow rice stem borer than the untreated control.
- Taxon
- riceOryza sativae0
- Treatment
- egg mass removal and insecticide applicationse4
- Interactor
- YRSBe3pest
- Outcome
- control of YRSBe3
- Direction
- bettere3
- Comparator
- the controle3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yellow rice stem borer (YRSB) Scirpophaga incertulas (Walker) is one of the most serious pests of rice in Southeast Asia”
e3“The results demonstrated that all measures provided better control of YRSB than the control”
e4“Efficacy of controlling measures was then evaluated with 11 treatments consisting of egg mass removal and insecticide applications”
Claim · model-written summary
Virtako 40 WG and Prevathon 5 SC had the highest efficacy when applied twice.
- Taxon
- riceOryza sativae0
- Treatment
- Virtako 40 WG and Prevathon 5 SCe5
- Outcome
- Efficacye5
- Direction
- higheste5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yellow rice stem borer (YRSB) Scirpophaga incertulas (Walker) is one of the most serious pests of rice in Southeast Asia”
e5“Efficacy of two newly used insecticides Virtako 40 WG and Prevathon 5 SC was highest when applied twice”
Claim · model-written summary
Removing egg masses and spraying Regent 800 WG once gave a better result than spraying Regent 800 WG twice.
- Taxon
- riceOryza sativae0
- Treatment
- removing egg masses and spraying Regent 800 WG oncee6
- Outcome
- resulte6
- Direction
- bettere6
- Comparator
- spraying Regent 800 WG twicee6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The yellow rice stem borer (YRSB) Scirpophaga incertulas (Walker) is one of the most serious pests of rice in Southeast Asia”
e6“A combination of removing egg masses and spraying Regent 800 WG once provided a better result than spraying Regent 800 WG twice”
The same questions in other papers
insecticide · control · Oryza sativa (rice)Positive and negative results
11 papers in the same direction as this paper · 4 in the opposite direction
- negative
- no effect
- no effect
12 papers more in this group
See all 16 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.